@pdfme/pdf-lib/dist/esm/__tests__/core/embedders/FileEmbedder.spec.js

Create and modify PDF files with JavaScript

import fs from 'fs';
import { PDFContext, PDFDict, PDFRef, FileEmbedder } from '../../../src/index';
const catRidingUnicornJpg = fs.readFileSync('assets/images/cat_riding_unicorn.jpg');
const usConstitutionPdf = fs.readFileSync('assets/pdfs/us_constitution.pdf');
describe(`FileEmbedder`, () => {
    it(`can be constructed with FileEmbedder.for(...)`, () => {
        const embedder = FileEmbedder.for(catRidingUnicornJpg, 'cat.jpg');
        expect(embedder).toBeInstanceOf(FileEmbedder);
    });
    it(`can embed files into PDFContexts without a predefined ref`, async () => {
        const context = PDFContext.create();
        const embedder = FileEmbedder.for(catRidingUnicornJpg, 'cat_riding_unicorn.jpg', {
            mimeType: 'image/jpeg',
            description: 'Cool cat riding a unicorn! 🦄🐈🕶️',
            creationDate: new Date('2019/12/01'),
            modificationDate: new Date('2020/04/19'),
        });
        expect(context.enumerateIndirectObjects().length).toBe(0);
        const ref = await embedder.embedIntoContext(context);
        expect(context.enumerateIndirectObjects().length).toBe(2);
        expect(context.lookup(ref)).toBeInstanceOf(PDFDict);
    });
    it(`can embed files into PDFContexts with a predefined ref`, async () => {
        const context = PDFContext.create();
        const predefinedRef = PDFRef.of(9999);
        const embedder = FileEmbedder.for(usConstitutionPdf, 'us_constitution.pdf', {
            mimeType: 'application/pdf',
            description: 'Constitution of the United States 🇺🇸🦅',
            creationDate: new Date('1787/09/17'),
            modificationDate: new Date('1992/05/07'),
        });
        expect(context.enumerateIndirectObjects().length).toBe(0);
        const ref = await embedder.embedIntoContext(context, predefinedRef);
        expect(context.enumerateIndirectObjects().length).toBe(2);
        expect(context.lookup(predefinedRef)).toBeInstanceOf(PDFDict);
        expect(ref).toBe(predefinedRef);
    });
});
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